Music-leaf turner



(No Model.) l 2 Sheets-Sheet 1.

C. H. LINDEMANN.

MUSIC LEAP TURNER.

No. 327,698. Patented 001'.. 6, 1885.

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`(No Modell) 2 Sheets-Sheet 2.

C.. H. LINDEMANN.

MUSIC LEAP TURNER.

No. 327,698. Patented Oct. 6, 1885.

UNITED STATES PATENT OFFICE.

CHARLES H. LINDEMANN, OF SAN FRANCISCO, CALIFORNIA.

MUSIC-LEAF TURNER.

SPECIFICATION forming part of Letters Patent No. 327,698, dated October 6, 1885.

Application filed .Iuly 111, 1884. Serial No.137,719. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES H. LINDE- MANN, ofthe city and county of San Francisco, and State of California, have invented an Improvement in Music-Leaf Turners; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to adevice for turning leaves or pages of books or music.

It consists of certain improvements in that class of turning devices in which a series of arms extend outward between the leaves of the sheet to be turned, and are actuated by short racks which engage the teeth of pinions formed upon the inner ends or journals of these arms.

The object of my invention is to provide a means for turning leaves in one direction by means of a pedal or foot-lever at the bottom of the music-stand, while the leaves may be re-turned by means of a second or releasing le- Verwhich allows the spring to act, and so turn the pages backward. It also consists of a means by which the music-rack may be raised or lowered to suit persons of different heights or in different positions without interfering with the turning mechanism.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a View of my leaf-turning device. Fig. 2 is an enlarged view of the mechanism at the foot. Fig. 3 is a view of the booksupport, showing the rack plate, guidearms, cord, and spring.

In the present case my device is applied to a music-stand having astandard, A, with feet B, by which it is supported. The s taudardA is a hollow tube, and C is a second tube fitted to slide within the first, so that it may be raised or lowered to any desired extent and held in position by a set-screw, D.

Upon the upper end of the stem C is supported the rack or frame E, upon which the music is placed. Below the rack E is an extension or plate having guides F at its opposite ends perforated, so that the ends of square bar G may slide through these openings and be guided in them. These bars G are secured to the opposite ends of the plate H, thus forming continuations of the plate,which has fixed upon its surface short toothed racks I, placed with relation to each other, as shown.

.I J are toothed pinion-wheels, each of which has an arm, K, of the leafturner projecting radially from it. From the ends of these arms K the thin double strips L project upward at right angles, so as to pass between or clasp the lea-Ves which are to be turned. The pinions of all these leaf-turning arms are looselyjournaled upon a pin passing through standards at the lower part of the frame, so as to allow the pinions to engage the toothed racks successively as the plate to which the racks are fixed is moved along. By this movement one of the pinions will be turned a half-revolution and its arm carried over so as to turn the leaf from one side of the rack to the other, when this will be released, and the next pinion will engage with its rack, and so on until all the leaves are turned. rIhis movement is produced by means of a cord, M, which extends up through the hollow standard over a pulley at the top, and thence `horizontally to the outer end ofone of the guiding rods or bars G,so that when the cord is pulled downward this horizontal portion acts to draw the bar, and with it the plate carrying the racks, horizontally across and below the music-support. A spiral spring, N, has one cnd attached to the opposite bar, G, and the other end to the lower part of the frame, so that its tension will be increased as the bar and plate are moved across by the action of the cord,and this tension of the spring serves to return the plate, and thus turnthe leaves back to their original position when the cord is released.

The center of the book or music is held in place by being slipped down behind the rod O, which extends upward along the central bar of the support, and a short distance above it.

The cord M, which extends down through the standard, as before described, passes over a small direction-pulley, I), below the standard and between the feet B, and thence over a larger roller, Q, around which itis coiled once or twice. This mechanism at the foot is supported by an arm, It,which projects centrally downward between the feet B, and may be suitably braced,so as to be steady. The pulley or wheel Q, is fixed to the shaft S, which extends through the frame at the lower part of the supportiiig-standard, within which it is journaled to turn. A double ratchet-wheel,

T, is secured to this shaft between the sup- IOO ports, and the arms of a lever, U, extend inward on each side of this ratchet-wheel, their inner ends being fulcrumed upon the shaft S,

so that the lever may turn loosely. From the point of the fulcrum the ends of the lever are bent upward, so that the pawlV may be journaled between them, its point resting upon the ratchetwheel, and being held there by the action of the spring XV. Another spring, X, below the frame presses against the outer end of the lever, which is spread or flattened, so that it may be operated by the foot, and the tendency ofthe last spring is to raise the lever upward. The action will then be as follows: Vhen the foot is placed upon the lever and it is pressed down, the pawl will engage the teeth of the ratchet and rotate it,with its shaft and the roller or wheel around which the cord is coiled. The action upon the cord moves the bars G and their intermediate plate,with the toothed racks, across the lower part of the stand, so as to turn the leaves, as before described. Each movement ofthe foot downward will move the ratchet-wheel forward one tooth, and the leaves may thus be turned until the end is reached. Then it is desired to allow theleaves to turn backward,it is done by means of a lever,Y,which is loosely fulcrumed upon the shaft S,between the two parts ofthe ratchetwheel T, and which has an end projecting upward, so as to press against the lower part of the pawl which engages the ratchet-wheel. Vhen the foot is pressed upon this lever, the action will be to raise the pawl, and this allows the horizontal spring across the lower part ofthe music-raek to act upon the transverse rack-plate and guide-bars, and thus draw them back, so as to turn the leaves to their original position.

By means of the wheel Q, around which the cord is coiled once or twice, there will be a certain surplus of cord, which may be let out when it is necessary to raise the rack by loosening the set-screw and allowing the upper telescopic portion, C, to be moved upward. This cord will be drawn off the roller until the standard is as high as is necessary. If the standard is to be lowered, this surplus cord will be coiled upon the roller, and it thus serves to adjust the length of the cord and keep it tight and ready to operate at all points.

Having thus described my invention, I do not claim, broadly, in a musicleaf turner, a plate having short racks acting upon the pinions or arms by which the leaves are turned.

I am also aware foot-treadles have been used for sliding toothed bars forward and backward with pulleys to bel turned by them, and cords connecting said pulleys with the bars to move them by being pressed on them, one treadle and one pulley being to pull the bars to the right for turning the leaves and the other to turn them back again, and such construction I therefore do not, broadly, claim; but

What I do claim as new, and desire to secure by Letters Patent, is

l. In a music-leaf turner, a plate carrying short racks placed diagonally upon it, so as to successively engage pinions by which the arms are moved, guide-rods extending in line from each end of this plate through guidingopenings, a cord attached to the end of one of these arms extending horizontally to a direction-pulley, and thence downward to an actuating-treadle, and a spiral spring having one end fixed to the rack and the other connected with the opposite one of these arms, so as to return the plate when released by the cord, as herein described.

2. In a music-leaf turner, the leaf-turning arms, with pinions pivoted in the center of the music support, the plate having short racks arranged diagonally across it, guides extending outward from its ends, one of which has a spring connected with it and the other a cord passing over direction-pulleys downward through the central stand and around a roller upon which it is coiled, together with a ratchet-wheel fixed to the shaft of said roller, 93

a foot-lever loosely fulcrumed upon the shaft and carrying a pawl engaging` the ratchet, and a holding-spring, substantially as herein described.

3. In a music-leaf turner, the music supporting frame, the leaf-turning arms,with pinions pivoted to the center oi' the music-support, a plate having the short racks arranged diagonally across it, guides extending outward from its ends, one of which has a spring connected with it and the other a cord which passes over direction pulleys downward through a central stand and around the roller, with the pawl and the ratchet mechanism by which said cord may be wound upon the roller, and a second lever fulcrumed upon the roller-shaft having its end constructed to raise the pawl and release the ratchet-wheel, whereby the movement of the roller may be reversed and the cord uncoiled therefrom by the action of the spring, as herein described.

4i. In a music leaf-turner, the leaf-turning arms with pinions, the short actuating-racks and connecting mechanism, cord, and foot'lever, as shown, the stand which may be telescopic,so as to be lengthened and shortened, together with a take-up roller or drum around which the cord passes, whereby the length of the cord will be adjusted to the height of the stand, as herein described.

In witness whereof I have hereunto set my hand.

l C. H. LINDEMANN. Vitnesses:

S. H. N ounsri, II. C. LEE.

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